Project Description


Closed loop extraction system

Closed loop extractor is a device used to extract solvents from solid substance.

Closed-loop extraction systems are the most state-of-the-art and safe systems for creating all types of cannabis concentrates, including shatter, crumble, live resin, and isolates. In the whole process, there are several parts serving the extraction of solvents. Solvents can be used and recycled in the closed loop extractor, which is very economic for users and very environment-protecting for people.

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Closed-loop extraction is not new or unique to the cannabis industry. For many years people have used closed-loop extraction to extract essential oils for things like food additives and perfumes. Recently, however, it has become a widely popular cannabis extraction method. Cannabis industry professionals use closed-loop extraction to extract cannabinoids (THC, CBD) and terpenes from cannabis plant material into an isolated concentrate.

Closed-loop extraction is a form of hydrocarbon extraction. However, unlike other variations of hydrocarbon extraction, closed-loop extraction occurs entirely within a closed system, which keeps the solvent from making any contact with the outside atmosphere. Closed-loop extraction offers benefits that other extraction methods are unable to provide, such as safety and efficiency.

What is Closed-Loop Extraction?

Closed-loop extraction uses solvents to extract cannabinoids. In the closed-loop system, solvent moves from a containment tank into an area where it can wash over the cannabis plant material. The closed-loop system recycles the solvent, so it washes over the cannabis many times repeatedly. This washing dissolves the cannabinoids and terpenes from the cannabis plant material. The concentrate is then refined, purged of the solvent, and collected.

The most common solvents to use in closed-loop extraction include the hydrocarbons butane, propane, and ethanol. Industry professionals also use carbon dioxide during extraction.

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The accessories of closed loop extractor

01. High pressure food grade hoses: the tube used to transfer liquid phase butane
02. Solvent tank: the container used to contain solvents
03. Product tubes: the tube used to transfer production
04. Collection chamber: the container used to collect oil
05. Recovery pump:used to provide pressure to recover the solvents
06. Material column: the reactor that cannabis gets extracted

The Benefits of Closed Loop Extractors

The key closed-loop extraction benefits include safety, efficiency, cost-effectiveness, and higher quality products.


One key closed-loop extraction benefit is safety.  Cannabis industry professionals regard closed-loop extraction as the safest way to extract cannabinoids.

Hydrocarbon solvents are flammable, pressurized gases. In closed-loop extraction systems, there are no opportunities for leaks if the equipment is maintained and operated at the appropriate standards. A contained system makes the risk of hazard almost non-existent. In fact, in our several thousand installations, we have never had a client have a safety issue or accident with Precision equipment.


Another closed-loop extraction benefit includes a higher-pressure capacity than open-loop extraction equipment. High pressure allows for maximum extraction of cannabinoids.

In addition to controlling temperature, closed-loop extraction systems are excellent at regulating temperature. Temperature directly controls the solubility of cannabinoids, so it’s essential to be able to control the temperature in the system.

Closed-loop extraction systems also prevent the solvent from being evaporated into the atmosphere and allow the solvent to be used many times without needing to be recharged.


One huge closed-loop extraction benefit is that hydrocarbon solvent is unable to leak out into the atmosphere. Equipment operators can reuse the solvent for extraction after extraction. This benefit leads to savings on solvent purchasing costs for businesses.

Higher-quality product

Closed-loop extraction technologies provide exceptional control over pressure and temperature, which offer an opportunity to produce the strongest, purest cannabis concentrates available. The vacuum oven removes most or all of the solvent’s residue, so many consumers also regard closed-loop extraction products as the safest to consume.

How Does A Closed-Loop System Work?

Closed-loop systems vary mechanically, depending on the solvent that will be used. However, the general method remains the same. There are three main containment areas: a vessel that contains the primary solvent, one for the cannabis plant material, and one that is used to collect the resulting extract.

Depending on the type of solvent being used, e.g. butane or carbon dioxide (CO2), the solvent may need to pass through the cannabis plant matter multiple times in order to strip off all the precious compounds, such as the cannabinoids and terpenes. For instance, butane is one of the most effective solvents and is capable of extracting almost all of the essential properties in one loop through the system. On the other hand, CO2 is a much more selective solvent and will take several more runs, and several more hours, to fully capture all the intoxicating and therapeutic properties of the cannabis plant.

The process begins with a tank of liquid solvent or a gas that is mechanically converted into a liquid solvent. The next step is to allow the liquid solvent to flow into the tank with the cannabis buds or trim. At this point, the solvent will dissolve the active compounds in the plant and create a solution. The final tank is where the resulting extract goes and where the initial solvent used is evaporated from the solution through the use of heat. When the solvent evaporates into a gas, it rises and is condensed back into the first tank. The solvent can then be reused, either on the same cannabis or for a fresh batch.

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Our Service

Pre-sale Service

  1. Provide 24-hour technical consulting reply;
  2. Provide professional quoted price;
  3. Provide detailed product performance specification;
  4. According to product’s using condition, technicians will offer rationalization proposals to assist clients to select proper product types;
  5. Provide other corollary equipment according to client requirements.

In-sale Service

  1. Begin to supervise from raw material, its qualified rate can reach to 100%;
  2. Whole manufacturing process are in strict accordance with promised procedure requirements, product qualified rate can reach to 100%;
  3. Provide product’s inspection record of key junctures to customers;
  4. Provide production schedule photos to customers at regular intervals;
  5. Package and transport products strictly accordance with export standard;
  6. Provide transportation schedule information to clients timely.

After-sale Service

  1. Provide targeted installation video;
  2. Under the premise of correct installation, normal maintenance and using, we guarantee one-year warranty period;
  3. When warranty period has expired, our sold products enjoys lifetime guarantee repair, we only charge cost price for changing product’s standard component and sealing component;
  4. During installation and adjustment period, our after-sale service staff will communicate with customers frequently to know product’s running state in time. Assist customers to install and adjust products until customers are satisfied;
  5. If product has malfunction during operation period, we’ll offer you satisfied answer in time. We’ll reply you within 1 hour and provide solution or send staff to spot within 24 hours after receiving maintenance notification.
  6. Lifelong free technical support. Conduct satisfaction survey and inquiry equipment running condition to clients by telephone or e-mail semiannually from the first day of equipment running, put on records of acquired information;
  7. Provide assistant service if product is damaged during transportation.

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